FreeBSD/Linux Kernel Cross Reference
sys/ufs/ufs/ufsmount.h

     /*-
      * Copyright (c) 1982, 1986, 1989, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)ufsmount.h  8.6 (Berkeley) 3/30/95
     * $FreeBSD: releng/10.1/sys/ufs/ufs/ufsmount.h 262779 2014-03-05 04:23:19Z pfg $
     */
    
    #ifndef _UFS_UFS_UFSMOUNT_H_
    #define _UFS_UFS_UFSMOUNT_H_
    
    #include <sys/buf.h>    /* XXX For struct workhead. */
    
    /*
     * Arguments to mount UFS-based filesystems
     */
    struct ufs_args {
            char    *fspec;                 /* block special device to mount */
            struct  oexport_args export;    /* network export information */
    };
    
    #ifdef _KERNEL
    
    #ifdef MALLOC_DECLARE
    MALLOC_DECLARE(M_UFSMNT);
    #endif
    
    struct buf;
    struct inode;
    struct nameidata;
    struct timeval;
    struct ucred;
    struct uio;
    struct vnode;
    struct ufs_extattr_per_mount;
    struct jblocks;
    struct inodedep;
    
    TAILQ_HEAD(inodedeplst, inodedep);
    LIST_HEAD(bmsafemaphd, bmsafemap);
    
    /* This structure describes the UFS specific mount structure data. */
    struct ufsmount {
            struct  mount *um_mountp;               /* filesystem vfs structure */
            struct  cdev *um_dev;                   /* device mounted */
            struct  g_consumer *um_cp;
            struct  bufobj *um_bo;                  /* Buffer cache object */
            struct  vnode *um_devvp;                /* block device mounted vnode */
            u_long  um_fstype;                      /* type of filesystem */
            struct  fs *um_fs;                      /* pointer to superblock */
            struct  ufs_extattr_per_mount um_extattr;       /* extended attrs */
            u_long  um_nindir;                      /* indirect ptrs per block */
            u_long  um_bptrtodb;                    /* indir ptr to disk block */
            u_long  um_seqinc;                      /* inc between seq blocks */
            struct  mtx um_lock;                    /* Protects ufsmount & fs */
            pid_t   um_fsckpid;                     /* PID permitted fsck sysctls */
            struct  mount_softdeps *um_softdep;     /* softdep mgmt structure */
            struct  vnode *um_quotas[MAXQUOTAS];    /* pointer to quota files */
            struct  ucred *um_cred[MAXQUOTAS];      /* quota file access cred */
            time_t  um_btime[MAXQUOTAS];            /* block quota time limit */
            time_t  um_itime[MAXQUOTAS];            /* inode quota time limit */
            char    um_qflags[MAXQUOTAS];           /* quota specific flags */
            int64_t um_savedmaxfilesize;            /* XXX - limit maxfilesize */
            int     um_candelete;                   /* devvp supports TRIM */
            int     um_writesuspended;              /* suspension in progress */
            int     (*um_balloc)(struct vnode *, off_t, int, struct ucred *, int, struct buf **);
            int     (*um_blkatoff)(struct vnode *, off_t, char **, struct buf **);
            int     (*um_truncate)(struct vnode *, off_t, int, struct ucred *);
            int     (*um_update)(struct vnode *, int);
            int     (*um_valloc)(struct vnode *, int, struct ucred *, struct vnode **);
            int     (*um_vfree)(struct vnode *, ino_t, int);
            void    (*um_ifree)(struct ufsmount *, struct inode *);
            int     (*um_rdonly)(struct inode *);
            void    (*um_snapgone)(struct inode *);
    };
   
   #define UFS_BALLOC(aa, bb, cc, dd, ee, ff) VFSTOUFS((aa)->v_mount)->um_balloc(aa, bb, cc, dd, ee, ff)
   #define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd)
   #define UFS_TRUNCATE(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd)
   #define UFS_UPDATE(aa, bb) VFSTOUFS((aa)->v_mount)->um_update(aa, bb)
   #define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd)
   #define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc)
   #define UFS_IFREE(aa, bb) ((aa)->um_ifree(aa, bb))
   #define UFS_RDONLY(aa) ((aa)->i_ump->um_rdonly(aa))
   #define UFS_SNAPGONE(aa) ((aa)->i_ump->um_snapgone(aa))
   
   #define UFS_LOCK(aa)    mtx_lock(&(aa)->um_lock)
   #define UFS_UNLOCK(aa)  mtx_unlock(&(aa)->um_lock)
   #define UFS_MTX(aa)     (&(aa)->um_lock)
   
   /*
    * Filesystem types
    */
   #define UFS1    1
   #define UFS2    2
   
   /*
    * Flags describing the state of quotas.
    */
   #define QTF_OPENING     0x01                    /* Q_QUOTAON in progress */
   #define QTF_CLOSING     0x02                    /* Q_QUOTAOFF in progress */
   #define QTF_64BIT       0x04                    /* 64-bit quota file */
   
   /* Convert mount ptr to ufsmount ptr. */
   #define VFSTOUFS(mp)    ((struct ufsmount *)((mp)->mnt_data))
   #define UFSTOVFS(ump)   (ump)->um_mountp
   
   /*
    * Macros to access filesystem parameters in the ufsmount structure.
    * Used by ufs_bmap.
    */
   #define MNINDIR(ump)                    ((ump)->um_nindir)
   #define blkptrtodb(ump, b)              ((b) << (ump)->um_bptrtodb)
   #define is_sequential(ump, a, b)        ((b) == (a) + ump->um_seqinc)
   #endif /* _KERNEL */
   
   #endif

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